4 doctors weighed in:

Can some one be diagnosed with latent TB just because he had a PPD + & apical pleural thickening on X-ray !?Even if he had sputum test (-)

4 doctors weighed in
Dr. Martin Raff
Internal Medicine - Infectious Disease
1 doctor agrees

In brief: Yes

A positive PPD means that you have living tubercle bacilli in your body.
This, in the absence of other findings or abnormalities is inactive tuberculosis. Sputum cultures will be negative.

In brief: Yes

A positive PPD means that you have living tubercle bacilli in your body.
This, in the absence of other findings or abnormalities is inactive tuberculosis. Sputum cultures will be negative.
Dr. Martin Raff
Dr. Martin Raff
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Dr. Omega Edwards, m.d.
Internal Medicine - Infectious Disease
1 doctor agrees

In brief: LTBI

Latent TB infection is diagnosed by having either a positive PPD or having a positive blood test (interferon gamma release assay).
A negative AFB smear means the number of microorganisms is so low that the lab cannot find one on the smear. Thus, you are highly unlikely to be contagious. A negative chest x-ray (no cavitation) coupled with a lack of symptoms makes an active infection unlikely. C md.

In brief: LTBI

Latent TB infection is diagnosed by having either a positive PPD or having a positive blood test (interferon gamma release assay).
A negative AFB smear means the number of microorganisms is so low that the lab cannot find one on the smear. Thus, you are highly unlikely to be contagious. A negative chest x-ray (no cavitation) coupled with a lack of symptoms makes an active infection unlikely. C md.
Dr. Omega Edwards, m.d.
Dr. Omega Edwards, m.d.
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Dr. Robert Kwok
Pediatrics

In brief: Yes, because...

If a sputum test is positive for tb, the person is considered "active" and is contagious (infectious).
If sputum is negative, and the person has a positive PPD that is read correctly, and has chest x-ray signs of past tb, then the person is called "latent". Latent means he caught the TB germ in the past, but is not contagious (not infectious) now. 5-10% of latent people may become active later.

In brief: Yes, because...

If a sputum test is positive for tb, the person is considered "active" and is contagious (infectious).
If sputum is negative, and the person has a positive PPD that is read correctly, and has chest x-ray signs of past tb, then the person is called "latent". Latent means he caught the TB germ in the past, but is not contagious (not infectious) now. 5-10% of latent people may become active later.
Dr. Robert Kwok
Dr. Robert Kwok
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